# Math Help - Chk Anwser to evaluate integral Problem

1. ## Chk Anwser to evaluate integral Problems

Evaluate $\int \frac{x^3+4}{x^2} dx$

$\int(\frac{x^3+4}{x^2})dx = \frac{x^2}{2}-\frac{4}{x}+C$

Evaluate $\int 2cos^2x dx$

$\int 2cos^2x dx = x + cos(x)sin(x)$

2. Originally Posted by Yogi_Bear_79
Evaluate $\int \frac{x^3+4}{x^2} dx$

$\int(\frac{x^3+4}{x^2})dx = \frac{x^2}{2}-\frac{4}{x}+C$

Evaluate $\int 2cos^2x dx$

$\int 2cos^2x dx = x + cos(x)sin(x)$
You can always check these by taking the derivative of your answer.

Both of these are correct. (With the comment that you need a constant of integration in your second answer.)

-Dan